Hello, Thank you for contacting us. To get rid of two menu’s you need to follow these steps
If you see already created menu’s then first delete these menus then follow the below steps
1) Go to Dashboard >> Then go to Appearance
2) Go to Menus
3) Create a menu select menu items and select left in the position then save
4) Create another menu select menu items and select right in the position then save
Go to your website and check
Hope it helps !!